Stop motion for circular-knitting machines



A. Z. HALL AND 'W. A; HUGHES.

STOP MOTION FOR CIRCULAR KNITTING MACHINES.

APPLICATION FILED NOV- 5. I921.

1,434,950, Patented Nov. 7, 1922.

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APPLICATION FILED NOV. 5, I92].

Patented Nov. 7, 1922.

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Aria/vie S T [w A ma Hu 8 2 m Patented Nomj, i923 ABIOUSE Z. HALL AND WI'ihLIAllllll. HUGHES, OF NASHVILLE, TENNESEEE, ASSIGNORS TO SCOTT & WILLIAMS, INQ, OF NEW YORK, N. Y., A CORPORATION OF MASSACHU- SETTS.

STOP MOTION F03 CIRCULAR-KNITTING MACHINES.

Application filed November 5, 1921. Serial No. 513,052.

T all "whom it may concern:

ment in Stop Motions for Circular-Knitting defective needles.

Machines, of which the following is a specification. I

Our invention relates to a devicefor circular knitting machines in which a single member acts both as welt-presser and detector for It is an improvement on the devices shown in Robert W. Scotts PatentsNos.,1,270,064; dated June 18, 1918, and 1,282,958 dated October :29, 1918.

' This executive member, which we shall call the presser-detector, is generally pivoted on the standard supporting the latch ring. Its field of operation lies just above the capring, sinkers and cylinder needles at the knitting point, and between the needle cylinder and dial plate. The normal operation of the machine as well as the actuation of the stop motion requires complete or partial withdrawal of the presser-detector from its usual forward position between the needle cylinder and dial plate. The presserdetectors have heretofore been arranged to swing on a fined center. Great delicacy of adjustment has been required to properly isolate the various functions of the presserdetector. This delicacy is hard to maintain in practical operation.

Our invention does away with the necessity for delicacy of adjustment and gives a positive and quick tripping of'the stop motion. It also permits greater length-wise movement of the presser "for yarn-guiding purposes. It eliminates all interference be tween the functions of pressing the Welt and detecting trouble in the needle cylinder. l/Ve accomplish. this by means of a novel sliding pin and'slot connection between the resser-detector, the machine and its control devices.

In the accompanying drawings- Fig. 1 is a plan of sufficient of a circular knitting machine embodying our invention to .show its operation; v

Fig. 2 shows our presser-detector and its immediate connections;

Fig. 3 is a vertical section through suflicient of the'head of a machine-to further illustrate the position ofour presscr-detector.

Fig. at is a detail view including arm I).

The presser-detector is shown in its nor mal operative or forward position in Fig. 1. Instead of fastening it to standard 1 by a fixed pivot we give it a moving pivot by insorting screwstud 2 through slot 3 of the presser-detector 4 into the standard 1. By means of spring'5 and pin 6 the presscr-demotor 4 is kept pointed toward the center of the needle cylinder unless hit by a needle. The presser-detector 4 is connected by wire 8 to the stop motion 9. This wire 8 carries an adjustable collar 10 hearing against lever-.11 when the presser-detector is forward or completely withdrawn. To make the collar 10 bear against lever 11 when the presser detector is in'these positions, the connection 12 between the wire 8 and presserdetector 4 should he so placed that the wire and presser detec-tor are at right angles when the latter is half withdrawn.

uany suitable means acting lengthwise on the presser-detector may be used to press the Welt or guide splicing yarns under thedial. l l'e have shown in Fig. l the well-known means described in Scotts Patent 1,282,958. The wire link p is hooked to the presserdetector at 12 and passed through a hole in the vertical arm 7) of a rocker p swinging on. stud 472 in a fixed part of the machine. A compression spring 0* surrounds link 233 and taking against a stop thereon provides means for holding the presser-detector forward under spring pressure at the desired parts of the knitting.

As shown in Fig. 2 the body of the presserdetector is longitudinal in shape, and has a slot 3 in it.

Fig. shows the relation of point 7 to the dial plate 13 and the needles 14:.

'l he operation of our presser-detector is as follows. When doing circular knitting the compression spring p" holds the presserdetector forward. The presser-detector can then press a welt, guide yarns under the dial plate described in Scotts Patents 1,256,062 and 1,282,958 or detect misplaced needles. 'Wlien a yarn change is due the cam cylinder will withdraw the arm 79 This will retract link p and mil back the Presser-detector. Hy reason o. screw stud 2, spring 5 and pin 6 the presser-detector moves in a straight line when actuated by link 9". P'iince wire 8 isjat right angles tothe pressep detector when the latter is midway in its linear movement, and the collar 10 just touches lever 11 when the piesscr detector is at the extremes of its linear motion, it follows that the stop motion 9 is unaffected by enyniovement of the presser-detector caused by link [2".

At all times that the presser-detector has its point 7 over the needle circle it is ready to detect needles which ere not depressed by the knitting cam. When hit by such needle the resser-detector instantlyswings away from pin 6 in a pivoted. movement and. trips the stop motion 9. Since the coller 10 is touching the lever 11 before the defective needle hits the prcsser-detector, it follows that the stop motion is tripped atthe instant of impact.

It is understood that Wire 8 may be con- 'nected to. an alarm means, rather than a.

stop motion, if that is lVe' cleim 1. 111 @Lcircular knitting machine a mem beiy'fiinct'ioning with a rotary motion as a detector for a stop motion, and with a straight-line motion e a welt presser.

preferred. J

esensc 2. In a circular knitting machine, a meml cr tunctionin with a rotarv motion as a detector for it stop motion and with a straight-line motion in a direction radialto detector fastened on a sliding pivot, a, pin,

movement, a stop-motion actuated by said pivoting movement and means imparting straight-line movement to said presscr-detcctor for pressing the welt. In testimony whereof We names to this specification.

ARIOUSE z. HALL. WILLIAM A. HUGHES.

have signed our 

